Over the last decade, the Sharing Economy has developed rapidly to become a significant source of market disruption. However, multi-disciplinary research into the phenomenon is constrained by uncertainties about its focus, scope and even its name. This paper’s research aims are to address those constraints by clarifying concepts and terminology to afford meaningful discourse and impactful activities and to develop a Sharing Economy Diagnostic (ShED) for categorising companies and organizations who participate in platform-based sharing. Within the Sharing economy, Information Systems occupy the sweet spot, being located at the intersection of demand for different types of market behaviours and enabling those demands through transformative roles for the technology platform.